Mining apparatus



, 1933. c. F. OSGOOD MINING APPARATUS April M 5 Sheets-Sheet l Original Filed March 31, 1930 pri M, 1933. c. F. osGooD MINING APPARATUS 5 sheets-sheet 2 Original Filed March 3l, 1930 dei@ SN wm am C. F. OSGOOD MINING APPARATUS- April 11, 1933.

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MINNG APPARATUS A Original Filed March 3l, 1930 5 Sheets-Sheet 5 l o .1 ...../A O 109 313 7 l E Jzvezor:

Patentecll 11, 1933 Cia RLES E. OSGOOD, F EMONT, NEW

' assrenoa 'ro surnam MACHINERY COMPANY, A CORPORTIGN OF MASSACHUSETTS MINING APPARATUS Application lecv March 81, 1930, Serial No. 2.1.40,310. Renewed June 171, 1981.

the wheel mounted universal'type adapted o to operate while supported and guided by the mine trackway.

An object of this invention is to provide an improved coal'mining apparatus. Another object is to provide an improved coal mining apparatus of the wheel mounted v universal type having improved adjustable kerf cutting mechanism operative to out kerfs in parallel planes either horizontally or vertically and in intersecting planes, thereby enabling the apparatus to accommodate itself to practically any cutting yconditions encountered. Another object is to provide an improved coal mining apparatus of the wheel mounted type adapted to operate while supported and guided by a mine trackway and having an improved adjustable kerf cutting mechanism whereby a kerf may be cut at or near the level of the mine bottom outside and below the level of the mine trackway. Still another object is to pro-l vide in a mining apparatus of the aforesaid character improved adjustable kerf cutting mechanism whereby the cutter bar may be positioned to cut a horizontal kerf at or near the level of the mine bottom outside and below the level of the mine trackway or to cut a vertical kerf at the center of the entry midway between the track rails. Yet another object is to provide in-` a mining ap- 5 paratus of the aforesaid character improved adjustable kerf cutting mechanism wherebyv the kerf cutter may be positioned to cut a horizontal kerf at or near the level of the mine bottom outside of and below the level 40 of the trackway and transversely across the end of the trackway, at or near the level of the mine roof, orto cut a series of vertical.

kerfs vin any desired position ,between the ribs to suit varying mining conditions. An- 5 other object is to provide in a mining machine of the aforesaid character adapted to cut the horizontal kerf at or near the level of the mine bottom outside and below the level of the mine trackway, improved adjustable supporting means for the kerf cut- 'substantially on line 5 5 of Fig. 1;

ter so that the kerf cutter may be positioned to make shear cuts at the center of the entry midway between the track rails or in any de,- sired position between the sides of the entry or to make horizontal cuts in any desired position between the mine bottom and the mine roof. Still another object is to provide in a mining apparatus of the aforesaid character an improved rotatable cutter head and adjusting structure whereby the kerf cutter may be positioned to cut a kerf outside and below the level of the mine trackway or to cut verticalkerfs and including means for adjusting the kerf cutter toward and from or into the axial line of the cutter head. These and other objectsand advantages of this invention will, however, hereinafter more fully appear., j

In the accompanying drawings there is shown for purposes of illustration one form which the invention may assume in practice.

In these drawings,-

Fig. 1 is a side elevational view of an illustrative embodiment of the Vimproved mining apparatus;

Fig. 2 is a plan view of the mining apparatus shown in Fig. 1; f

Fig. 3 is an enlarged fragmentary side elevational view of theapparatus shown in Fig.

1, parts being shown in vertical section to illustrate structural details; f

Fig. 4 is a sectional view taken substantially on linel 4:-4 of Fig. 2; j

Fig. 5 is a horizontal sectional view taken 85 Fig. 6 is a transverse vertical sectional view 2 taken substantially on line 6 6 of Fig. 5;

Fig., 7 is a transverse vertical sectional view taken substantially onk line 7--7 of 90 Fig. 2;

Fig. 8 is a detail sectional view of a portion of the mechanism shown in Fig. 7

Fig. 9 is a detail sectional view taken substantially on line 9-9 of Fig. 1, and illustrat- 95 ing a portion of the cutter head structure.

Fig. 10 is a fragmentary bottom view of' the cutter supporting structure shown in Fig. 9;

Fig. 11 is a transverse vertical sectional 100 Y- view taken substantially on line 11-11 of Fig. 4;

Fig. 12 is a detail sectional view taken on line 12-12 of Fig. 11;

Fig. 13 is a diagrammatic elevational view illustrating the apparatus in a mine entry with the kerfcutter in a position to make a horizontal top cut at the level of the mine roo Fig. 14 is a diagrammatic elevational view showing the kerf cutter in a position to make a horizontal cut at the level of the mine bottom;

Fig. 15 is a diagrammatic plan view illustrating the apparatus making a horizontal cut on the mine bottom outside and below the level of the mine trackway in accordance with the arc wall system;

Fig. 16 is a diagrammatic elevational view showing the apparatus with the kerf cutter in a position to make a shear cut; and

Fig. 17 is a diagrammatic plan view showing the apparatus with the cutter in a position to make a shear cut at the center of the entry.

In this illustrative embodiment of the invention there is shown a coal mining apparatus of the wheel mounted universal type generally comprising a truck frame 1 supported by wheels 2 adapted to run along a mine trackway 3. Supported in an elevated position on the truck frame is a widely extended horizontal turntable base 4 guiding for rotative movement about a vertical axis, a horizontal turntable 5. Supported by the turntable is a cutter carrying head 6 rotatable about a horizontal axis extending radially from the turntable axis and supporting through a parallel motion link structure generally deslgnated 7, a cutter support 8 on which a usual cutter bar 9 is pivotally mounted. Mounted on the rear end of the truck frame is a motor 10, herein preferably of the reversible electric type, which drives a truck wheel driving mechanism generally designated 11 and also through suitable connections the mechanism for rotating the turntable, for rotating the cutter head about its axis, for adjusting the link supporting structure 7 for swinging the cutter bar 9 about its pivot and for actuating the cutting elements on the cutter bar.

Now'referring to the specific truck structure, and more particularly the truck wheel driving mechanism 11, it will be noted that the motor shaft 12 is connected by a suitable coupling 13 to a horizontal longitudinally extending power shaft 14 herein arranged midway between the sides of the apparatus. Fixed to the power shaft 14 is a spur pinion 15 driving through a spur idler gear 16 a spur gear 17 fixed to a horizontal longitudinally extending shaft 18. The shaft 18 is horizontally disposed and extends longitudinally of the apparatus and is suitably journaled within a base frame 19 rigidly secured to the sides of the truck frame 1. Fixed to the shaft 18 is a worm 20 (see Fig. 7 meshing with a worm wheel 21 rotatably mounted on a transverse shaft 22 suitably journaled within a base frame 19. This worm wheel 21 may be operatively connected to the shaft 22 by means of a multiple disc clutch 23 of a usual design having suitable cam operating mechanism including a hand lever 24. Fixed to this transverse shaft 22 is a brake drum 25 which is engaged by a brake band 26 also arranged to be controlled by the hand lever 24. When this hand lever is moved in one direction the clutch 23 is applied and the brake 26 released and in the opposite direction the brake is applied and the clutch released, although it is obvious that separate operating means may be employed for the clutch and brake if desired. The shaft 22 is connected by a suitable coupling 27 to an alined shaft 28 likewise suitably ]'ournaled Within the base frame 19. Journaled on the shaft 28 is a spur gear 29 connectible with the shaft by a jaw clutch 30 splined to the shaft, and this 'gear meshes with aspur gear 31. Keyed to the shaft 28 is a spur pinion 33 meshing with a spur gear 34 (see also Fig. 8) secured to a transverse shaft 35 arranged parallel with the shaft 28 and likewise suitably journaled within the base frame 19. Splined to the shaft 35 is a slidable pinion 36 adapted to mesh with a spur gear 37 keyed to the hub of the spur gear 29. If desired, suitable operating mecha- `nism may be provided for the clutch 30 and slidable pinion 36 so that when one is con nected the other is released. As illustrated, a horizontal transverse shaft 38 is suitably journaled within the base frame 19 and sey cured to this shaft is a chain sprocket 39 connected by a chain and sprocket connection 40 to the rear truck wheel axle. The front and rear truck wheel axles are connected in driving relation by a usual chain and sprocket connection 41. Various means may be employed for effecting rotation of the shaft 38 selectively in opposite directions and in the illustrative form disclosed includes a bevel gear 42 keyed to the hub of the spur gear 31 and meshing with a bevel gear 43 suitably journaled within the frame 19. Meshing with the bevel gear 43 is a bevel gear 44. The bevel gears 42 and 44 rotate in opposite directions and a jaw clutch 45 is provided for alternatively connecting these bevel gears to the shaft 38. From the foregoing description it will be evident that when the jaw clutch 30 is shifted to connect the spur gear 29 to the shaft 28 and the pinion 36 is out of mesh with the spur gear 37 the truck wheels may be driven to propel the apparatus in one direction or the other along the mine tra'ckway at a relatively high transport speed from the motor 10 through spur gearing 15, 1, 17, worm gearing 20, 21, fricthrough the reduction gearing 33, 34, 36, 37.

Now referring to the improved turntable structure, it will be noted that formed integral with the truck frame is an annulus or ring-like frame portion 47. The turntable is supported by this annular frame and is herein in the form of a circular casting 48 which constitutes the main supporting frame for the kerf cutting mechanism. This castn ing forms the turntable rotatable about the center of the annular' frame 47 and is guided for rotative movement on the annular frame by a depending annular flange 49 litting the interior periphery of the annular frame and a radial iange 50 overlying the top surface of the annular frame. 1f desired any suitable anti-friction rollers of any conventional design orany other` anti-friction devices may be provided between the turntable and the annular supporting frame 47 for reducing the friction between the turntable and frame.

Suitable devices driven by the motor 10 are employed for rotating the turntable relative to the annular supporting frame as hereinafter described and in the present instance may include mechanism of the same general character as that ,described in my copending application Ser. No. 432,541, filed March 1, 1930. It will be observed that the horizontal power shaft 14 extends radially toward the center of thevturntable and is suitably journaled within the turntable base. Fixed to the forward end ofthis power shaft is a bevel gear 51 meshing with a bevel gear 52 fixed to a vertical shaft 53 suitably journaled within the turntable casting. Keyed to the vertical shaft 53 intermediate its ends is a spur pinion 54 meshing with a spur gear 55 fixed to a vertical shaft 56 suitably journaled within the turntable casting. The spur gear 55 meshes as shown in Fig. 5 k.with

spur gears 57 and. 58. Rotatable with the.y spur gear 57 vis a worm 59 meshing with a slow speed Worm wheel 60. This worm wheel is connectible by a usual multiple disc clutch 61 having any suitable type of operating means, to a horizontal shaft 62 suitably journaled within the turntable casting. Fixed to this shaft is a worm 63 meshing with a worm wheel 64 (see also Figf3) keyed to a' vertical shaft 65 likewise suitably journaled within the turntable casting. Fixed to'the lower end of this shaft is a spur pinion 66 projecting through'an opening 67 in the depending flange 49 and meshing with internal gear teeth 68 herein cut in the inner wall of the i,annular supporting frame 47. Again referring to Fig. 5 it will be noted that rotatable with the spur gear 58 is a worm 69 meshing with a fast speed worm wheel 701 having its teeth oppositely inclined from the teeth of the worm wheel 60 and operative, upon application of a multiple disc clutch 71, to eect drive of the shaft 62 at a fasty speed in a direction opposite from the slow speed drive described above. It will thus be seen that upon the application of one or" the other of the friction clutches 61, 71 the turntable 5 may be rotated relative to the annular supporting frame 47 at a relatively high bar positioning speed in one direction or at a relatively slow speed appropriate for cutting in the opposite direction. The worm gearing 63, 64 is herein of the self-locking type and automatically maintains the turntable 5 in its different positionskof adjustment relative to the turntable base.

Now referring to the cutting mechanism supported by the turntable 5, it will be observed that the turntable casting is provided with an integral extension frame or arm 73 Q overlying the annular frame 47 and rigidly braced with respect to the turntable casting by horizontal webs 74. In the present construction, formed integral with this exten-vr sion frame or arm 73 at its outer end, is a circular frame 75 arranged in a substantially vertical position and rigidly braced with respect to the arm by means of'vertical webs 76. As shown in Fig. 3, secured to this circular frame 75 is an annular retaining and bearing sleeve 77 having an inwardly directed ange 78. Between the Ilan e 78 and a shoulder 79 formed on the circu ar frame 75 there is rotatably mounted a cutter head 6 as hereinafter described. This sleeve 80 'isfastened to a projecting neck member or frame 81 by which the cutting mechanism is supported as will later be described.

rThe mechanism for effecting rotation of the cutter head 6 about the neck axis' herein comprises a bevel gear 82 fixed to the upper end of the vertical shaft 53 as clearly shown in Fig. 3. Meshing with lthis bevel gear is a bevel gear 83 fixed to a horizontal shaft sleeve 80Av which herein forms a rotatable neck for the- 84 extending radially from the axial line ofthe turntable and suitably journaled within the turntable casting. As illustrated, fixed to this shaft is a spur gear 85 meshing with a spur gear 86 liXed to a parallel shaft 87 likewise suitably journaled within the turn` Secured to this shaft is a bevel ninion 88 meshing with reverse bevels 89 and 90 (see also Fig. 6). These reverse bevels are alternatively connectible by multiple disc clutches 91, 92 respectively of a usual design to a transverse table. casting.

shaft 93 suits rac ably journaled within the turntable casting. These clutches are provided with any suitable operating means including an operating handle 94 conveniently located at the top of the turntable. Secured to the shaft 93 is a worm 95 meshing with a worm wheel 96 fixed to a horizontal shaft 97 arranged parallel with the shaft 84 above referred to and likewise suitably journaled within the turntable casting. Fixed to the forward end of the shaft 97 is a spur pinion 98 meshing with an internal gear 99 herein formed integral with the sleeve 80 by which the rotatable cutter carrying head 6 is supported. It will thus be seen that upon suitable application of the clutches 91, 92 the cutter head 6 `may be rotated about the neck axis in one direction or the other to position the cutter bar 9 into a plurality of intersecting planes about the neck axis. The worm gearing 95, 96 is of the self-locking type and when the clutches 91, 92 are released, automaticall locks the cutter head 6 against rotation a out the axis ofv the neck, thereby maintaining the cutter bar in any of its adjusted positions about the neck axis.

The mechanism for supporting the cutter bar 9 on the cutter head 6 and for adjusting the cutter bar into parallel planes toward and from the neck axis and into the axial line of the neck will now be described. As shown in Figs. 9, 10 and 11, the necky frame 81 is provided with parallel side walls 100 extending parallel'to and equidistant from the axial line of the neck. J ournaled within these side walls is a transverse hinge shaft 101 arranged with its axis perpendicular to and intersecting the axial line of the neck. J ournaled on this hinge shaft is a bevel gear 102, which meshes with a bevel gear 103 (see also Fig. 4) xed to the forward end of a neck shaft 104. `This neck shaft is suitably journaled Within and extends axially through the neck frame 81 and has fixed thereto at its rear end a spur gear 105 meshing with a spur gear 106 fixed to the forward end of a shaft 107 alined with'the power shaft 84 above referred to. lThe shafts 84 and 107 are connected in driving relation by a usual manually controllable jaw clutch 108, this clutch being releasable at will to interrupt the drive for the cutting mechanism. In the present construction, pivotally mounted at its rear end on the hinge shaft 101 is a main supporting link member or arm 109 and this link member has pivotal connection at its front end with a transverse shaft 110 connected 'to the cutter supporting frame 8. secondary link member or arm 111 arranged substantially parallel with the link 109 is pivotally connected at its ends to transverse shafts 112 and 113 respectively connected to the neck frame 81 and cutter supporting frame 8. rilhese arms or links form a parallel motion structure and are so into the axial line of the neck. The main arm or link 109 has segmental portions 114 overlapping the side walls 100 of the neck frame and these segments have formed thereon worm gear teeth 115. As shown in Fig. 3, meshing with these worm gear segments are parallel worms 116 fixed to parallel shafts 117 suitably j ournaled within the neck frame 81. The worm gearing 115,116 is of the selflocking type and automatically maintains the parallel link members in their different positions of adjustment. Fixed to these shafts are worm wheels 118 meshing respectively with worms 119 fixed to a transverse shaft 120 suitably j ournaled within the neck frame 81. Journaled on the shaft 120 is a spur gear 121 connectible with the shaft by a jaw clutch 122 having suitable operating means including an operating handle 123. This spur gear 121 meshes with an idler gear 124 journaled on a transverse shaft 125 supported within the side walls 100 of the neck frame spur gear 126 secured to and rotatable with v the bevel gear 102. It will thus be seen that when the spur gear 121 is connectedby the clutch 122 to the shaft 120 the arm or link member 109 may be swung about its pivot in one direction or the other by power from the neck shaft 104 through bevel gearing 103, 102, spur gear 126, 124, 121, transverse shaft 120, worm gearing 119, 118, shafts 117, and worms 116 meshing with the worm gear segments 115 secured to the arm.

Now referring to the drive for the cutter chain mounted on the cutter bar 9, it will be noted that meshing with the bevel gear 102 (see Fig. 4) is a bevel gear 127 fixed to the rear end of a shaft 128 suitably rotatably supported by the main arm or link member 109. Fixed to the forward end of this shaft is a bevelgear 129 meshing with a bevel gear 130 vjournaled on the transverse shaft 110. Meshing with the bevel gear 130 is a bevel gear 131 fixed to a shaft 132 arranged parallel to a line parallel to the neck shaft 104 and suitably journaled within the cutter supporting frame 8. Fixed to the forward end of this shaft is a bevel gear 133 meshing with a bevel gear 134 fixed to a transverse' shaft 135 arranged with its axis perpendicular to the axial line of the neck and suitably journaled within the cutter supporting frame. Secured to this shaft 135 is a chain sprocket 136 which engages and drives the usual endless cutter chain 137 mounted for orbital movement on the margin of 'the cutter bar 9. wil?` thus be seen that irrespective of bevel gearing disclosed permitting pivotalI 4gear engagingposition, this means being renoaaae vthe angular position of the parallel link structure relative to theneck frame the cutter cham may be driven, the arrangement of the movement of the links about their axes without interrupting the drive. The cutter bar 9 is provided with a plural-part supporting frame structure 138 and the frame sections thereof have annular bearing portions 139 which are rotatably supported on hub portions 140 integral with the cutter supporting frame 8 so that the cutter bar may be swung into diHerent angular positions about the axial line of the shaft 135.

The mechanism for swinging the cutter bar 9 about its pivotal axis herein comprises a spur gear 142 meshing with the spur gear 124 above referred to, and rotatably supported on the transverse shaft 112. Formed on the hub of the spur gear 142 is bevel gear 143 meshing with a bevel gear 144 fixed to a shaft 145 suitably journaled on the link 111.

yFixed to the forward end of this shaft is a bevel gear 146 meshing with reverse bevels 147 and 148 rotatably supported by a transverse shaft 149 journaled onthe link 111 and these bevels ,are alternatively connectible to this shaft by a jaw clutch 150. FiXed to the shaft 149 is a bevel gear 151 meshing with a bevel gear 152'secured to a 'shaft 153 journaled at the side of the link 111 and driving a worm 154 meshing with a worm wheel 155 fixed to the transverse shaft 113. Secured to the shaft 113 is a worm 156 which meshes with a worm wheel 157 journaled on the hub ortion of one of the annular bearing members 139 for the cutter bar 9. Pivotally mounted at 158 on the cutter' bar support is a latch 159 which, when in the position shown in Fig. 4, engages the teeth of the worm wheel 157 to connect rigidly the latter to the cutter bar 9. Any suitable means 160 is'employed for holding the latch159 in its leasable at will to permit release of the latch from the gear to permit free swinging of the cutter bar about its axis. It will hereln be noted that upon connection of one or the other of the reverse bevels 147, 148 to the shaft 149 the cutter bar may be swung in one direction or the other about its pivotal ams relative to the cutter supporting frame 8 and that when the clutch 150 lis placed'in its neutral position the cutter bar swmgmg mecha-A nism is entirely disconnected from its drive.

As shown most clearly in Fig. 9, the ends A off the shaft 112 which project within the bea s 'portions at the sides of the link 111 are eccentric relative to the body of the shaft so that by the turning of said shaft, true A relation between said link member andthe neck structure may be slightly varled for the purpose of correcting any deviation from' direct relation between the fourbearings .of

the parallel link structure or for the purpose of putting said relation out of true sucient tointentionally slightly tilt the cutter bar out of parallel relation with the axial line of the neck; this being at times desirable when there is a slant in the upper or lower face of the vein of coal or if there isa slight slant in the track on which the apparatus isd guided. The adjustment of said shaft 112 is effected manually by a worm wheel 161 fixed to one end of. the shaft, and meshing with this worm wheel is a worm 162 fixed to a shaft suitably journaled in a housing 163 secured to the side of the link member 111. The worm shaft is provided with suitable means for the reception of a suitable wrench or other turning instrument. The worm gearing 161, 162 is self-locking and automatically maintains the shaft in its dierent adjusted positions. It will thus be seen that the cutter bar 9 may be tilted about an axis transverse to the direction of its length as desired.

lt will be noted that the motor 10 constitutes the single source of power` for driving the various mechanisms of the apparatus and that suitable connections may be provided for supplying electrical energy to this motor and suitable electrical controlling apparatus for controlling such supply if desired, and that a usual poweridriven cable reel may be mounted on the rear end of the truck and suitably connected to the motor 10 to Wind in or pay out the power conductor cable as the apparatus moves along the mine trackway. As such electrical controlling apparatus is usual in coal mining apparatus such as that disclosed, description and illustration of the same is thought unnecessary. It will also be evident that if desired, suitable elevating mechanism` may be provided between the turntable base and truck frame so that the turntable may be adjusted into different elevated positions relative to the truck wheels, for instance, power elevating mechanism of the same general character as that disclosed in my cpending application Ser. No. 432,541 mentioned above or in my copending applicavtion Ser. No. 409,564 filed November 25, 1929.

,the track rails. When the working face is reached, the fast truck wheel drive is disconnected yfrom the motor 10 by releasing the friction clutch 23 and the jaw clutch 30. If it is desired to make a swinging cut at or near` ysa the level of the mine bottom in front of the end of the trackway, the operator first manipulates the clutch 150 to connect the bevel gear 147 to the shaft 149 and the cutter bar 9 is swung about its pivot relative to the cutter head from the central position shown in Fig. 2, laterally to a position adjacent the righthand rib of the entry, the clutch 150 thereafter being disconnected. The operator then shifts the jaw clutch 122 into a position to connect the gear 121 to the shaft 120 and the parallel link members 109, 111 are swung downwardly about their pivots to move the cutter bar 9 from its elevated transport position to a position at or near the level of the mine bottom as shown in Fig. 14, the clutch 122 thereafter being released. The cutter chain drive sprocket 136 ris then connected in driving relation with the motor by suitable connection of the clutch 108 and as a result the cutter chain 137 isv rapidly circulated about the margin of the cutter bar. The clutch 150 is then connected to effect drive through the bevelgearing 146, 1481 and the cutter bar 9 is swung transversely in its plane across the front end of the trackway at a `relatively slow cutting speed to make an arcuate cut beneath the coal. When the cutter bar reaches a position adjacent the left-hand rib the clutch 150 is disconnected. After the completion of the swinging cut, the clutch 122 is shifted into its connected position, and upon reversal of the motor 10, the parallel link members 109, 111 are swung upwardly about their pivots to move the cutter bar again into its elevated transport position above the level ofthe trackway, the clutch 122 thereafter being moved to its released position and the clutch 108 released to disconnect the cutter chain 137 from its drive. With the motor still running in its reverse direction the clutch 30 is connected and upon application of the friction clutch 23 the apparatus is propelled rearwardly at a relatively high speed along the mine trackway to the mine entry.

If 1t is desired to cut a horizontal kerf at or near the level of the mine bottom outside and below the level of the mine trackway, the operator applies the friction clutch 71 thereby causing the turntable 5, together with the cutting mechanism su ported thereby, vto be swung horizontally rom the central position shown in Fig. 2 to the full line position indicated at A in Fig. 15. During horizontal swinging movement of the turntable relative to the truck the cutter bar 9 may be swung simultaneously about its pivot relative to the cutter head in the opposite directionunder the control of the clutch 150 until the parts assume the position shown. When the parts are thus disposed with the bar pivot lying outside the mine trackway, the operator releases the friction clutch 71 of the bar swing drive and the clutch 122 is connected thereby causing the parallel link members 109, 111 to be swung downwardly about their pivots until the cutter bar assumes a position at or near the level of the mine bottom, the cutter bar being positioned relative to the mine bottom as shown in Fig. 14 at that time. The clutch 122 is then released. The pinion 36 is then slid into meshing engagement with the gear 37 and upon application of the friction clutch 24, the truck wheels are driven to propel the apparatus bodily in a forward direction along the mine trackway at a relatively slow cutting speed, sumping the cutter bar beneath the coal from position A shown in Fig. 15 to position B indicated in dotted lines in that figure.

The friction clutch 23 is then released and the brake 26 set. The operator then applies the friction clutch 61, and the turntable 5 together with the cutter mechanism supported thereby is swung horizontally at a slow cutting speed to effect horizontal swingin movement of the cutter bar in its plane. uring the initial swinging movement ofthe turntable 5 the cutter bar 9 is swung about its pivot under the control of the clutch 150 in a reverse direction until the parts assume a straight line position wherein the cutter bar extends parallel to a line including the bar pivot and the turntable axis as indicated at C in Fig. 15. After the cutter bar has reached the left-hand rib as indicated at D in Fig. 15 and the swinging cut has been completed, the cutter bar 9 is again swung about its pivot rearwardly under the control of the clutch 150 while rotation of the turntable 5 is continued, the turntable and cutter bar swinging simultaneously in opposite directions at that time until they assume the position indicated at in Fig. 15. The jaw clutch 45 is then shifted to connect the reverse bevel 44 to the shaft 38 and upon application of the friction clutch 23 the apparatus is propelled bodily rearwardly along the mine trackway at a slow cutting speed moving the cutter bar from the position E in Fig. 15 to position F in that figure. After the completion ofthe cut beneath the coal the parts are again returned to their transport position with the cutter bar disposed in an elevated position above the level of the mine trackway.

A horizontal kerf may be cut at or near the level of the mine roof simply by applying one or the other of the friction clutches 91, 92 controlling the reverse bevels 89,' 90 respectively, to effect rotation of the cutter head about the neck axis and the clutch 122 is then connected and the parallel link members 109, 111 are swung upwardly about their pivots to move the cutter bar to the position shown at G in Fig. 13, wherein the cutter bar occupies its top cutting position. The cutter bar is then sumped in, swung transversely in its plane, and withdrawn from the coal in accordance with the usual arc wall method of cutting. It will be noted that duri any of the horizontal cutting operations Iiigescribed t above, the cutter bar may be tilted about a transverse axis simply by manually rotating the worm gearing 161, 162 to effect adjustment of the eccentric shaft 112 to vary the relative positions of the link pivots.

A shear or vertical cut may be inserted in the coal face simply by applying one o r the other of the reverse frictions 91, 92 controlling the reverse bevels 89, 90 respectively thereby enabling the cutter head to be rotated about the neck axis to bring the cutter bar 9 into a position to yswing vertically as shown in Fig. .16.' During the shearing operation the cutter bar is first sumped in, then swung downwardly in its plane, and thereafter withdrawn from the coal in a manner similar to that described above in regard to the horizontal cutting in accordance with the arcwall method. lt will further be noted that the cutter bar may be moved bodily into parallel planes toward and from the neck axis and into the axial line of the neck thereby enabling the apparatus to cut a series of parallel horizontal kerfs and parallel vertical kerfs and in a plurality of intersecting planes. By adjustment of the parallel link structure supporting the cutter bar, the latter may be moved into a shearing position midway between the sides of the track rails and thereby enable the apparatus to make a center cut, as shown at H in Fi 17.

s a result of this invention it will be noted that an improved coal mining apparatus is provided having improved adjustable kerf cutting mechanism whereby horizontal kerfs may be cut at or near the level of the mine bottom outsideand below the level of the mine trackway and also shear or vertical cuts including a shear or vertical center cut in the coal face midway between the track rails thereby facilitating the shooting of the coal from the solid and increasing the quantity of lump coal obtainable. It will lfurther be noted that under certain conditions the cutter bar may be adjusted to cut at or near the level of the mine roof or if desired, in parallel planes between the mine roof and the mine bottom. It will still further be noted that an improved universal .coal cutter is provided having improved adjusted kerf cutting mechanism whereby the cutter bar may be positioned to cut in parallel planes either vertically or horizontally in any vposition be` tween the mine roof and mine bottom and between the ribs of the entry. It will further be noted that an improved coal cutter is provided wherein ,the adjusting mechanism for the kerf cutting mechanism is extremely Hexible, it being possible to operate the apparatus as a mounted bottom cutter, top cutter, center cutter, shear cutter and slabbing machine thereby enabling the apparatus to accommodate itself to practically every mining condition encountered within the normal working range of a track cutting machine.

These and other uses and advantages of the improved mining apparatus will be clearly apparent to those skilled in the art.

While there is in this application speciically described one form which this invention vmay assume in practice, it will be understood4 that this form of the same is shown for purposes of illustration and that -the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims. i

What I claim as new and desire to secure by Letters Patent is:

1. ln a mining apparatus, a wheeled truck adapted to run along a mine trackway, and kerf cutting mechanism on said truck including a kerf cutter, adjustable supporting means for said kerf cutter whereby the latter may be positioned wholly outside the trackway and in horizontal planes below the top of the trackway to cut a horizontal kerf at the level of the mine bottom outside and below the level of the mine trackway, or to cut a vertical kerf extending in the direction of the trackway and midway between the sides of the apparatus, and motor operated devices for adjusting said kerf cutter into aforesaid positions.

2. ln a mining apparatus, a wheeled truck adapted to run along a mine trackway, and kerf cutting mechanism on-said truck including a pivoted kerf cutter, adjustable supporting means for said kerf cutter for positioning the latter wholly outside the trackway and in horizontal planes below the top ofthe trackway to cut a horizontal kerf at the level of the mine bottom outside and below the level of the mine trackway, to cut ,a vertical kerf extending parallel to the track rails and midway between the track rails, or a horizontal kerf at the level of the mine roof, and motor operated devices for adjustingsaid kerf cutter into aforesaid positions.

3. ln a mining apparatus, a wheeled truck adapted to run along amine trackway, a horizontal turntable on said truck, and .kerf

vcutting mechanism supported by said turn- 4.1n a mining apparatus, a wheeled truck adapted to run along a mine trackway, a horizontal turntable on said truck, and kerf cutting mechanism supported by ysaid turntable -including a rotatable neck frame disposed on a horizontal axis and a pivoted kerf cutter supported by said neck frame and adjustable, while said kerf cutter remains at all times parallel to said horizontal axis, into positions toward and from the axial line of s aid neck frame and into said axial line. I

5. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a horizontal turntable on said truck, motor operated devices for rotating said turntable, a cutter head mounted on said turntable for rotation about an axis extending radially from the axial line of the turntable, motor operated devices for rotating said cutter head about its axis, and a pivoted cutter` bar supported by said head and adjustable, while said bar remains at all times parallel to said head axis, relative to said head toward and from the axial line of said head and into said axial line.

6. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, kerf cutting mechanism supported by said truck including a pivoted keri" cutter and adjustable supporting means for said kerf cutter for positioning the latter wholly outside the trackway and in horizontal planes below the top of the trackway to make a horizontal cut at the level of the mine bottom outside and below the level of the mine trackway, or to make a vertical cut extending in the direction of the trackway and midway between the sides of the apparatus, and motor 'operated devices for adjusting saidl kerf cutter into aforesaid positions.

7. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, kerf cutting mechanism supported by said truck including a pivoted kerf cutter and adjustable supporting means for said kerf cutter for positioning the latter wholly outside the trackway and in horizontal planes below the top of the trackway to make a horizontal cut at the level of the mine bottom outside and below the level of the mine trackway, or to make a vertical cut extending in the divrect on of the trackway and midway between the sides of the apparatus, motor operated devices for adjusting said kerf cutter into aforesaid positions, and vices for driving the truck wheels to propel the apparatus along the mine trackway to eii'ect sumping and withdrawal movements of said ker cutter.

8. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, kerf cutting mechanism supported by said truck including a pivoted kerf cutter and adjustable supporting means for said kerf cutter for positioning the latter wholly outside the trackway and in horizontal planes below the top of the trackway to make a horizontal cut at the level of the mine bottom outside and below the level of the mine trackway, or to make a vertical cut extending in the direc# tion of the trackway and midway between the sides of the apparatus, motor operated devices motor operated dej for adjusting said kerf cutter into aforesaid positions, motor operated devices for swinging said kerf cutter about its pivot, and motor operated devices for driving the truck wheels to propel the apparatus along the mine trackway to effect sumping and withdrawal movements of said kerf cutter.

9. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a horizontal turntable on said truck, a rotatable neck frame mounted on said turntable for rotation about a horizontal axis, a pivoted kerf cutter mounted on said neck frame, adj ustable supporting means between said kerf cutter and said neck frame for positioning said kerf cutter in different parallel planes respectively diierently spaced from and including the axial line of said neck frame, and motor operated devices for adjusting said kerf cutter into aforesaid positions.

10. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a motor on said truck, devices driven by said motor for driving the truck wheels to propel the apparatus, kerf cutting mechanism supported on said truck including a pivoted kerf cutter and adjustable supporting means for said kerf cutter for positioning the latter at the level of the mine bottom wholly outside of and below the level of the mine trackway or to make a vertical cut extending in the direction of the trackway and midway between the sides of the apparatus, devices driven by said motor for adjusting said kerf cutter into aforesaid ositions, and devices driven by said motor or actuating said kerf cutter and for swinging said kerf cutter about its pivot.

11. In a mining apparatus, a wheeled truck adaptedto run along a mine trackway, a motor carried by said truck, devices driven by said motor for driving the truck wheels to propel the apparatus, a horizontal turntable on said truck, a neck frame mounted on said turntable for rotation about a horizontal axis, a pivoted kerf cutter adjustably mounted on said neck frame for movement, throu h a series of parallel positions, toward and rom and into the axial line of the neck, devices driven by said motor for rotating said turntable, devices driven by said motor for rotating said neck frame about its axis, devices driven by said motor for adjusting said kerf cutter into aforesaid positions, for actuating said kerf cutter and for swinging said kerf cutter about its pivot.

' 12. In a mining apparatus, a Wheeled truck adapted to run along a mine trackway, a frame mounted on said truck for rotation about a vertical axis, a rotary supporting `body mounted on said frame for rotation about a horizontal axis, an elongated kerf cutter, means intervening said supporting body and said kerf cutter for carrying the latter for orbit/al movement around the axial line of said rotary supporting body and toward and from and into said axial line and to swing in planes parallel to said axial line.

In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a frame mounted on said truck for rotation about ay vertical axis, a rotary supporting body mounted on said frame for rotation about a horizontal axis, an elongated kerf cutter, means intervening said supporting body and said kerf cutter for carrying the latter in planes parallel to the axial line of said supporting body, for orbital movement around said axial line, and from and toward and into'said axial line, and means for actuatin-g said kerf cutter for cutting.

14. In a mining apparatus, a wheeled truckA adapted to run along a mine trackway, a frame mounted thereon for rotation about a vertical axis, a rotary body mounted on sai frame for rotation about a horizontal axis, an elongated kerf cutter, and means intervening said body aud said kerf cutter for carrying the kerf cutter parallel to the axial line of said body, for orbital movement around said lineand from and toward and cutter, a 6()I int-o said line. and for swinging said kerf cutter into a plane vparallel to said axial line.

15. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a horizontal turntable on said truck, supporting means having a neck seated rotatably in a bearing on said turntable, an elongated cutting mechanism hinged to said supporting means to permit movement of said mechanism toward and from the axial line of said neck while said cutting mechanism remains parallel to said axial line, and transmission means extending through said neck for actuating said cutting mechanism.

6. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a support mounted on said truck for adjustment horizontally vrelative thereto about a vertical axis and including supporting means having a neck seated rotatably in a bearing, an elongated kerf cutting mechanism hinged to said supporting means to permit movement of said mechanism toward and from the axial line of said neck while said cutting mechanism remains parallel to said axial line, and a neck shaft extending through said neck and arranged in operative relation with the cutting mechanism for actuating said cutting mechanism.

17 In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a horizontal turntable on said truck, a kerf group of members supporting said kerf cutter and mounted on said turntable, said' group being supported for rotation on the turntable on a horizontal axial line and said group being foldable on three lines which are between said kerf cutter and the attachment to the turntable, two of said lines being transverse to said axial line and the other of said hinge lines being transverse to said two hinge lines last mentioned and perpendicular to said axial line whereby, by the folding and unfolding of said members on the first two hinge lines said kerf cutter is carried bodily by a parallel movement toward and from said axial line and whereby, by the folding and unfoldingof said members on the third of said hinge lines the kerf cutter is swung in a plane which is parallel to said axial line, operator controlled means carried by said group to effect folding on said two hinge lines, and operator controlled means `.to effect folding on said third hinge line, and means for actuating said kerf cutter.

18. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a rotatable neck frame which is in a bearing which is horizontal, operator controlled power driven means for rotating said neck frame, a kerf cutter, link members supporting said kerf cutter on said neck frame for movement on said neck frame toward and from the axial line of said neck, means extending through said neck frame for actuating said kerf cutter, and means for adjusting said kerf cutter, bodily horizontally to position the same wholly outside the track- Way to cut a horizontal kerf at the level of the mme bottom outside and below the level of the mine trackway.

19. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, kerf cutting mechanism mounted thereon including a neck frame rotatable about a horizontal axis and a pivoted kerf cutter adjustably mounted on said neck frame for movement, through a series of parallel positions, toward and from and into the axial line of said neck, mechanism for rotating said neck frame to move said kerf cutter orbitally about the neck axis, and mechanism for adjusting said kerf cutting mechanism bodily horizontally relative to said truck to position said kerf cutter wholly outside the trackway to cut a horizontal kerf at the level of the mine bottom outside and below the level of the mine track- Way.

20. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, kerf cutting mechanism mounted thereon including a neck frame rotatable about a horizontal axis anda pivoted kerf cutter adjustably mounted on said neck frame for movement, thro-ugh a series of parallel positions, toward and from and into the axial line of said neck, mechanism for rotating said neck frame to move said kerf cutter orbitally about the neck axis, and mechanism including a frame mounted on said truck for rotation about a vertical axis, for adjusting said kerf cutting mechanism horizontally relative to said truck to position said kerf cutter to cutV a kerf at the level of the mine bottom outside and below the level of the mine trackway.

21. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a motor on said truck ixed with respect thereto as to movement about a vertical axis, and ker cutting mechanism on said truck and driven by said motor including a pivoted kerf cutter and adjustable supporting means for said kert cutter whereby the latter may be positioned wholly outside the trackway to cut a horizontal kerf at the level of the mine bottom outside and below the level ot the mine trackway, or to cut a vertical kerf midway between the sides of the apparatus.

22. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a motor on said truck ixed with respect thereto as to movement about a vertical axis, and kerf cutting mechanism on said truck and driven by said motor including a kerf cutter, adjustable support-ing means for said kerf cutter whereby the latter may be positioned wholly outside the trackway to cut a horizons tal kerf at the level of the mine bottom out side and below the level of the mine trackway, or to cuta vertical kert` midway between the sides of the apparatus, and motor operated devices for adjusting said kert1 cutter into aforesaid positions.

23. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a motor on said truck fixed with respect thereto as to movement about a vertical axis, and kerf cutting mechanism on said truck and driven by said motor including a pivoted kerf cutter and adjustable supporting means for said kerf cutter for positioning the latter wholly outside the trackway to cut a horizontal kerf at the level of the mine bottom outside and below the level of the mine trackway, to cut a vertical kerf midway between the track rails, or to cut a horizontal kert at the level of the mine roof.

24. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a motor on said truck xed with respect thereto as to movement about a vertical axis, and kerf cutting mechanism on said truck and driven by said motor including a pivoted kerf cutter, adjustable supporting means for said kerf cutter for positioning the latter wholly outside the trackway to cut a horizontal kert` at the level of the mine bottom outside and below the level of the mine trackway, to cut a vertical kerf midway between the track rails, or to cut a horizontal kei-f at the level of the mine roof, and motor Operated devices for adjusting said kerf cutter into aforesaid positions. j

25. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a motor on said track fixed with respect thereto as to movement above a vertical axis, and

kerf cutting mechanism on said truck and driven by said motor including a pivoted kerf cutter, and adjustable supporting means for said kerf cutter for positioning the latter into different parallel horizontal planes between the mine bottom and mine roof and in vertical cutting positions between the ribs of the entry, and including means for positioning the cutter bar wholly outside the trackway to cut a horizontal kerf at the level of the mine bottom outside and below the level of the mine trackway.

26. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a horizontal turntable on said truck, a motor on said truck fixed with respect thereto as to movement about a vertical axis, and kerf cutting mechanism supported by said turntable and driven-by said motor including a cutter head rotatable about an axis extending radially from the axial line ot" said turntable, a pivoted kerf cutter supported on said head, and adjustable supporting means for said kerf cutter for moving the latter bodily toward and from the axial line of said head and into said axial line.

27. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a horizontal turntable on said truck, a motor on said truck fixed with respect thereto as to movement about a vertical axis, and kerf cutting mechanism supported by said turntable and driven by said motor including a rotatable neck frame disposed on a horizontal axis and a pivoted kerf cutter supported by said neck frame and adjustable bodily toward and from the axial line ot' said neck frame and into said axial line.

28. In a mining apparatus, a Wheeled truck adapted to run along a mine trackway, a horizontal turntable on said truck, a motor 0n said truck ixed with respect thereto as to movement about a vertical axis, motor oper ated devices for rotating said turntable, a cutter head mounted on said turntable for rotation about an. axis extending radially from the axial line of the turntable, motor operated devices for rotating said cutter head about its axis, and a pivoted cutter bar supported by said head and adjustable bodiljy relative thereto toward and from the axial line of said head and into said axial line.

29. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a motor on said truck ixed with respect thereto as to movement about a vertical axis, kerf cutting mechanism supported by said truck and driven by said motor including a pivoted kerf cutter, adjustable supporting means for said kerf cutter for positioning the latter Wholly outside the trackway to make a horizontal cut at the level of the mine bottom outside and below the level of the mine trackway, or to make a vertical cut midway between the sides of the apparatus, and motor operated devices for adjusting said kerf cutter into aforesaid positions.

' 30. In a mining apparatus, a. wheeledtruckvn adapted to run along a mine trackway, Aa

motor on said truck fixed with respect thereto as to movementabout a vertical axis,`kerf cuttin'g mechanism supported by said .truck and driven -by said motor including a pivoted kerf cutter, adjustable supporting means for said Vkerf cutterfor positioning the latter wholly outside the trackway to make a horizontal cut at the level of the mine bottom outside and below the level of the mine trackway, or to make a vertical cut midwayfbe-A tween the sides of the apparatus, motor operateddevices for adjusting said kerf cutter into aforesaid positions, and motor operated devices for driving the truck wheels to propel the apparatus along the mine trackway to effect sumping and withdrawal movements 'of said kerf cutter.

31. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a motor on said truck fixed with respect thereto as to movement about a vertical axis, kerfcutting mechanism supported by said truck v and driven by said motor including a pivoted and withdrawal movements of saidkerf cutter.

32. In a mining apparatus, a wheeled 'truck adapted to run `along a mine trackway, a ymotor on said truck fixed with respect thereto as lto movement about a vertical axis, a horizontal turntable on said truck, a rotatable neck frame mounted on said turntable for rotation about a horizontal axis, cutting mechanism driven by said motor including a fpivoted kerf cutter mounted on said neck frame, adjustable supporting means' between said kerf cutter andsaid neck frame for positioning said kerf cutter in different parallel planes respectively differently spaced from and in the axial line of said neck frame, and motor operated devices for adjusting said kerf cutter into aforesaid positions.

33. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a motor on said truck, devices driven by said motor for driving the truck wheels to propelA the apparatus, kerf cuttin mechanism supported on said truck including a pivoted kerf cutter and adjustable supporting means for neck frame about its axis,

said motorlfor adjusting said kerf cutter intosaid kerf cutter for positioning the latter at the leyel of the mine bottom wholly outside of and below the'levelof the mine trackway, or to make a vertical cut midway between the sides of the apparatus, devices driven by said motor for adjusting said kerf cutter into aforesaid positions while said motor remains stationary with' respect to said truck, and devicesdriven by Isaid motor for actuating said kerf cutter andfor swinging said kerf cutter about its pivot. v

34. In a mining apparatus, a wheeled truck adapted to\ run along a mine trackway,"a

motor carried by said truck, devices driven by said motor for driving the truck Wheels to propel the apparatus, a horizontal turntable on said truck, a neck frame mounted on said turntable for rotation about a horizon-V tal axis, a mounted on through a pla-nes, toward and from and into ythe axial line ofthe neck, devices driven by said motor for rotating said turntable while said motor remains stationary relative tosaid truck, devices driven by said motor for rotating Lsaid devices driven by pivoted kerf cutter adjustably said neck frame for movement,

aforesaid positions, for actuating said kerf cutter and for swinging said kerf cutter about its pivot.

35. In a mining apparatus, a wheeled truck adapted to `run along a mine trackway, a motor on said truck fixed with respect thereto as to movement about a vertical axis, a frame mountedkon said truck for'rotation about a vertical axis, a rotary supporting body mounted on said frame for rotation about a horizontal axis,

cutting mechanism driven by said motor including an elongated kerf cutseries of positions in parallel ter, means intervening said supporting body p and said kerf cutter for carrying the latter for orbital movement around the axial line of said rotary supporting body .and towardy and from and into said axial line and to swing in planes parallel to said axial line.

36. In a mining apparatus, a wheeled truck adapted to run' along a mine trackway, a motor on said truck fixed `with respect thereto as to movement about a vertical axis, a frame mounted on said truck forrotation about a vertical axis, a rotary supporting body mounted on said frame for rotation about a horizontal axis, cutting mechanism driven by said motor including an elongated kerf cutter, means intervening said supporting body and said kerf cutter for carrying the latter in planes parallel to theaxial line of said supporting body, for orbital movement around said axial line, and from and toward and into said axial line, and means for actuating said kerf cutter for cuttin In mining apparatus, a wheeled truck adapted to run along amine trackway, a motor on said truck fixed with respect thereto as to movement about a vertical'axis, a frame mounted thereon for rotation about a vertlcal axis, a rotary body mounted on said frame for rotation about a horizontal axis, cutting mechanism driven by said motor including an elongated kerf cutter, and means intervening said body and said kerf cutter for carrying the kerf cutter parallel to the axial line of said body, for orbital movement around said line and from and toward and into said line and for 'swinging said kerf cutter in a plane parallel to said axial line.

38. In a mining apparatus, awheeled truck adapted to run along a mine trackway, a motor on said truck fixed with respect thereto as to movement about a vertical axis, a horizontal turntable on said truck, supporting means having a neck seated rotatably in a bearing on said turntable, cutting mechanism driven by said motor including an elongated cutting mechanism hinged to said supporting means to permit movement of said mechanism toward and from the axial line of said neck while remaining parallel to said axial line, and transmission means extending through said neck for actuating said cutting mechanism.

39. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a motor on said truckv fixed with respect 'thereto as to movement about a vertical axis, a'support mounted on said truck for adjustment horizontally relative thereto about a vertical axis and including supporting means hav.- ing a neck seated rotatably in a bearing, cutting mechanism driven by said motor including an elongated kerf cutting mechanism hinged to said supporting means to permit movement of' said mechanism toward and from the axial line of-said neck while remaining parallel to said. axial line, and a neck shaft extending through said neck and arranged in operative relation with the cutting mechanismfor actuating said cutting mechamsm. Y

40. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a motor on said truck fixed with respect thereto as to movement about a vertical axis, a horizontal turntable on said truck, a rotary neck resting in a bearing on said turntable, a rotary neck shaft located in said neck on the axis of the latter, cutting mechanism driven by said motorand plurally articulated to said neck and arranged in operative relation to said neck shaft, and operator controlled means for rotating said neck shaft.

4l. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a motor on said truck fixed with respect thereto as to movement about a vertical axis, a horizontal turntable on said truck, a kerf cutter,

' a group of members supporting said kerf cutter and mounted on said turntable, said group being supported for rotation on the turntable ',ial line and whereby, by the folding on a horizontal axial line and said group being foldable on three lines which are between said kerf cutter and the attachment to the turntable, two of said lines being transverse to said axial line and the other of said hinge lines being transverse to said two hin ge lines last mentioned and perpendicular to said axial line whereby, by the folding and unfolding of said members on the rst two hinge lines' said kerf cutter is carried bodily by a parallel movement toward and from said axL an unfolding of said members on the third of said hinge lines the kerf cutter is swung in a plane which is parallel to said axial line, operator controlled means carried by said group to effect folding on said two hinge lines, and operator controlled means to effect folding on said third hinge line, and means driven by said motor for actuating said kerf cutter.

42. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a motor on said truck fixed with respect thereto as to movement about a vertical axis, a rotatable neck frame which is in a bearing which is horizontal, operator controlled power driven means for rotating said neck frame, a kerf cutter, link members supporting said kerf cutter on said neck frame for movement on said neck frame toward and romthe axial line of said neck, means driven by said motor and extending through said neck frame for actuating said kerf cutter, and means for adjusting said kerf cutter bodily horizontally to a position wholly outside the trackway to cut a horizontal kerf at the level of the mine bottom outside and below the level of the mine trackway.

43.` In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a

motor on said truck fixed with respect thereto as to movement about a vertical axis, ker cutting mechanism mounted on said truck and driven by said motor, said cuttinr mechanism including a neck frame rotatable about a horizontal axis and a pivoted kerf cutter adjustably mounted on said neck frame for movement, through a series of positions in parallel planes, toward and from and into the axial line of said neck, mechanism for rotating said neck frame to move said kerf cutter orbitally about the neck axis, and mechanism for adjusting said kerf cutting mechanism bodily horizontally relative to said truck to position said kerf cutterI wholly outside the trackway to cut a horizontal kerf at the level of the mine bottom outside and below the Alevel of the mine trackway.

44. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a motor on said truck fixed with respect thereto as to movement about afvertical axis, kerf cutting mechanism mounted on said truck and driven by said motor, said cutting mechanism including a neck frame rotatable about a horiablymounted on said neck frame for movesaid kerf cutting mechanism ment, through a series of positions in parallel planes, toward and from and into the axial line of said neck, mechanism for rotating said neck frame to move said kerf cutter orbitally about the neck axis, and mechanism including a frame mounted on said truck for rotation about a vertical axis, for adjusting bodily horizontally relative to said truck to kerf cutter to cut a kerf at the mine bottom outside and below the mine trackway.

45. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a motor on said truck, a horizontal turntable on said truck and turnable relative to said motor and truck about a vertical. axis, and kerf cutting mechanism table including a support rotatable about an axis extendin radia ly from theaxial line of said turnta le, a pivoted kerf cutter carvlevel of the the level of ried by said support and swingable relative said support thereto, adjustable supporting means for said kerf cutter for moving said kerf cutter, while the latter remains at all times parallel to the axial line of the support, toward'and from the axial line of said support, and devices driven by said inotor for actuating said ad-4 justable supporting means to move said kerf cutter into aforesaid positions.

46. lin a mining apparatus, a wheeled truck adapted to run along a mine trackway, a motor on said truck, a horizontal turntable on said truck and turnable relative to said motor and truck about a vertical axis, kei-f `cutting mechanism supported by said turn` table including a support rotatable about an axis extending radially from the axial line of said turntable, a pivoted kerf cutter carried by and swingable relative thereto, said kerf cutter having cutting appliances thereon, adjustable supportingmeans for saidkort cutter for moving said kerfrcutter toward and from the axial line Vof said support, and devices driven by said motor for actuating the cutting appliances on said kei-f cutter.

47. ln a mining apparatus, a wheeled truck adapted to travel along a mine trackway, and adjustable -kert cutting mechanism on said truck including a kerf cutter, and an adjustable supporting structure` between said kerf cutter and said truck including'a support turnable-horizontally relative to said truck, a second support mounted on said first support for rotation relative thereto about a horizontal axis, and devices for adjusting said supporting structure to position said kerf cutter to cut a horizontal korf at the level of the mine door outside and below the level of the mine trackway and to cut a vertical leertY in a plane in which said second support axis position said.

supported by said turn-j' .shearing cut tion extending longitudin y of the truck.

48. In amming a paratus, a wheeled truck adapted to travel a ong a mine trackway, a horizontal turntable on said truck, and adj ustable kerl cutting mechanism on said turntable including a kerf cutter and adjustable supporting structure between said kerf cutter and said turntable including a support rotatable relative to said turntable about an axis extending radially from the axial line of said turntable, and devices for adjustin said supporting structure to ositioii said erf cutter to cut a horizontal erf at the level of the mine floor outside of and below the level of themine trackway, in a plane in which said sup ort axis lies when said sulpport is in a osition extending longitudinal y of the truck.

49. In a mining apparatus, a wheeled truck ada ted to travel along a mine trackway, and ker cutting mechanism including a pivoted kerf cutter and an adjustable supporting structure for said kerf cutter including means swingable horizontally relative to said truck to position said kerf cutter wholly outside the trackway to cut a kerf at the level of the mine floor outside and below the level of the mine trackwayand movable to adjust said kerf cutter into diderent horizontal lanes relative to the truck, and swingable a ut a longitudinal axis relative to said truck to position said kerf cutter to make a vertical in a lane in which said longitudinal axis lies w en said sup orting structure is in a position extending on 'tudinall and midway between the sides o the truck and also adjustable to osition said kerf cutter in different paralle planes when in such vertical shearing position.

50. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a motor on said truck xed with respect thereto as to movement about a vertical axiakert cuttin mechanism on said truck and driven by said motorincluding a pivoted kericutter andladjustable supporting means for said ker cutter whereb t Jlatter may be posi- `tioned wholly outside the trackway to cut a .thereto as to movement about a vertical axis kerf cutting mechanism on said truck and driven by saidmotor including a kerf cutter, adjustable; supporting means for said and to cut a vertical ker its and withdrawal movements of said kert cut- Y iso j kerf cutter.

kerf cutter whereby the latter may be positioned wholly outside thetrackway to cut a horizontal kerf at the level of the 'mine bottom outside and below the level of the mine trackway, or positioned to cut a vertical kerf midway between the sides of the apparatus, motor operated devices for adjusting said kerf cutter into aforesaid positions, and motor operated devices for driving the truck wheels to propel the apparatus bodily along the mine trackway to eiect sumping and withdrawal movementsyof said kerf cutter.

52. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a motor on said truck fixed with respect thereto as to movement about a vertical axis, kerf cutting mechanism on said truck and driven by said motor including a pivoted kerf cutter and adjustable supporting means for said kerf cutter for positioning the latter wholly outside the trackway to cut a horizontal kerf at the level of the mine bottom outside and below the level of the mine trackway, or positioning said kerf cutter to cut a vertical kerf midway between the track rails, or a horizontal kerf at the level of the mine roof, and motor operated devices for driving the truck wheels to propel the apparatus bodily along the mine trackway to effeet sumping and withdrawal movements of said kerf cutter.

53. In a mining apparatus, a wheeled truck adapted to run along a mine trackway, a motor on said truck xed with respect thereto as to movement about a vertical axis, kerf cutting mechanism on said truck and driven by said motor including a pivoted kerf cutter, adjustable supporting means for said kerf cutter for positioning the latter wholly outside the trackway to cut a horizontal kerf at the level of the mine bottom outside and below the level of the mine 'trackway, or for positioning said kerf cutter to cut a vertical kerf midway between the track rails, or a horizontal kerf atl the level of the mine roof, motor operated devices for` adjusting said kerf cutter into aforesaid positions, and motor operated devices for driving the truck wheels to propel the apparatus bodily alon the mine trackway to eiect sumping an withdrawal movements of said 54. In a mining apparatus, a portable base,A a horizontal turntable mounted on said base for rotation relative thereto about a vertical axis, an arm structure pivotally mounted on said turntable adjacent the forward edge of Vthe latter to swing in a vertical direction in a diametric plane relative thereto about a horizontal axis extending transversely of said arm structure, said arm structure extending in advance of said base,a kerf cutter pivotally mounted on the outer extremity of said arm structure to swing horizontally relative thereto to cut a horizontal kerf, and

vaxis,

Laoaeae means for swinging said arm structure in aforesaid vertical direction relative to said turntable to position the kerf cutter into parallel horizontal planes above and below the planes of said turntable.

55. In a mining apparatus, a portable base. a horizontal turntable mounted on said base for rotation relative thereto about a vertical an arm structure pivotally mounted on said turntable to swing in a vertical direction relative thereto about a horizontal axis extending transversely of the arm structure,

a kerf cutter pivotally mounted on the outer extremity of said arm structure to swing horizontally relatively thereto to cut a horizontal kerf, and means for automatically maintaining said kerf cutter parallel to a horizontal plane during vertical swinging of said arm structure about its axis relative to said turntable, said arm structure swinging in a plane diametric of said turntable.

56. In a mining apparatus, a portable base, a horizontal turntable mounted on said base for rotation relative thereto about a vertical axis, parallel links pivotally mounted on said turntable for swinging movement in a vertical direction relative thereto, a kerf cutter pivotally mounted on the outer extremities of said links for horizontal swinging movement relative thereto to cut a horizontal kerf, and means for swinging said links in aforesaid direction lrelative to said turntable to position the kerf cutter to cut horizontal kerfs above and below the level of said turntable.

57. In a mining apparatus, truck adapted to travel along a mine trackway, adjustable kerf cutting mechanism on said truck including a kerf cutter, an adjustable supporting structure between said kerf cutter and said truck including a support turnable horizontally relative to said a Wheeled l truck and an arm structure pivotally mountjusting said supporting structure to 'position said kerf cutter to cut horizontal kerfs above and'below the level of said turntable including a horizontal kerf at the level of the mine flooroutside and below the level of the mine trackway.

58. In a mining apparatus, a wheeledV truck adapted to travel along a mine trackway` kerf cutting mechanism including a pivoted plane kerf cutter. an adjustable ,suD- porting structure for said kerf cutter including an adjustable arm structure swingable horizontally and vertically relative to said truck and on the outer extremity, of which said kerf cutter is pivotally mounted and ldjustable to positionsaid kerf cutter whollevel of the mine floonoutside and below the level of the mine trackway, and means for maintaining said kerf cutter with its plane constantly parallel to a common plane duringvertical swinging of said arm structure truck.

59. In a mining apparatus, a portable base,` a horizontal turntable on said base, supporting means on said turntable, kerf cutting mechanism, and an ady'ustable vsupporting structure for said cutting mechanism plurally articulated to said supporting means for swinging adjustment relative to said turntable to position said kerf cutting mechanism, by movements during which v truck to position said kerf cutter to cut, a

horizontal kerf at the level of the mine bottom outside and below the level of the mine trackway. f

v61. ln a mining apparatus, a portable base, a horizontal turntable mounted on said base, parallel links pivotally mounted on said turntable i tion relative thereto about parallel horizontal axes, a frame to which the outer extremities o said links are pivotally connected about parallel horizontal ases. a kerl cutter pivotally mounted on said trame, and

` means for swinging said links in aforesaid vertical Adirection relative to said turntable to move vthe ker cutterinto dierent parallel horizontal planes.

62. ln a mining apparatus, a portable base, a horizontal turntable on said base, an arm pivotally mounted' onl said turntable to swingina vertical direction relative thereto about a Ahorizontal axis transverse to said arm, a frame to which the outer extremity of said arm is ed on said frame, and means for swinging said trameabout its pivotal connection with said arm during vertical swinging of said arm .about its axis relative to said turntable always-to maintain the kerl cutter parallel to a common straight line. f 63. Ina mining apparatus, a portable base,

outside thetrackway to cut a kerf at the.

pivotal mounting relative to said' 1 arm always to to swing in a vertical direcpivotally connected about ag. parallel axis, aekerf cutter pivotally mounta horizontal turntable on said base, an arm pivotally mounted on said turntable'l to swing in a vertical direction relative theretoabout a horizontal axis transverse to said arm, a frame to which the outer extremity of said arin is pivotally connected about a parallel axis, a kerf cutter pivotally mounted on said frame, and means for swinging said frame about itspivotal connection with said parallel to a common straight line during swinging of said arm,`said turntable and arm eing adjustable relative to said base to position said kerf cutter to cut a horizontal kerf at the level of side of said base.

l 64. In a mining apparatus, a portable base, a horizontal turntable on said base, an arm pivotally mounted on said turntable to swing in a vertical direction relative thereto 'about a horizontal axis transverse to said arm, a frame to which the kouter extremity of said arm is pivotally connected about -a y parallel axis, a kerf cutter pivotally mounted on said frame, frame about its pivotal connection with said armv during swinging of said arm, said turntable and arm being adjustable relative to said base to position said kerf cutter to cut qa horizontal kerf at the level of the mine bot- @5 i tom at one side of said base and to position said kerf cutter to cut a horizontal kerf in planes above the top of said turntable.

65. In a mining apparatus, a portable base,

a horizontal turntable on said base, an arm 10@ structure pivotally mounted on said turn-- table to swing in a vertical direction relative thereto, a horizontal plane kerf cutter pivotally mounted on the outer extremity of said arm structure, said turntable and Varm structure being adjustable relative to said base to position said kerf cutter to cut a horizontal kei-f at the level of the mine Hoor at one sideL of said base, and means for maintaining said plane kerf cutter parallel to a horizontal/11@ plane during vertical swinging' of said arm structure about its pivotal mounting relative to said turntable. f k

6b, In a mining a paratus, a ortable base,` a horizontal turnta le inounte for rotation relative thereto about a vertical axis, an arm structureipivotally mounted on said turntable to swing relative thereto, a plane ker cutter pivotallyimounted on the outer extremity of said swing relative thereto, and means for maintaining the planeet said kerf cutter-always arallel to a, common plane during swing-A ing of said arm 'structure .mounting on said turntable. 67. In a mining apparatus, aportable base, a supporting structure mounte on said base to swing horizontally relative tliereto about a vertical axis, an elongated kerf cutter carrying cutting elements along its`lengtli and i -maintan the kei-f cutter "75 the mine bottom `at one 80 and means for swinging said 90 0n said base 115 arm structure to 12@K about its pivotal Q 

